UIAlertController Error When called in a modal presented view controller in swift

Question

I have a view controller which is modally presented and when i run UIAlertController, keep getting a error message . how can i work around this.

the alert is trigged from a button which checks a text field is empty or not.

@IBAction func registerAction(sender: AnyObject) {
if(userEmail.isEmpty){
        alertMessage("Fields Are Empty")
    }
}



func alertMessage(userMessage:String){  
    var myAlert = UIAlertController(title: "Alert", message: userMessage, preferredStyle: UIAlertControllerStyle.Alert)
    let okAction = UIAlertAction(title: "OK", style: UIAlertActionStyle.Default, handler: nil)
    myAlert.addAction(okAction)
    self.presentViewController(myAlert, animated: true, completion: nil)
}

Error when i run the alert

Warning: Attempt to present <UIAlertController: 0x7f9bbb9060d0>  on <AlertApp.CustomSignupVC: 0x7f9bb94accb0> which is already presenting <UIAlertController: 0x7f9bbb926660>

its not connected to a segue – Mugunthan Balakrishnan Aug 20 '15 at 07:19 — Mugunthan Balakrishnan, Aug 20 '15 at 07:19

score 2 · Accepted Answer · edited May 23 '17 at 10:29

2

Try to add it in main operation queue.

dispatch_async(dispatch_get_main_queue()) {
    self.presentViewController(myAlert, animated: true, completion: nil)
}

Check this relative question : Presenting a view controller modally from an action sheet's delegate in iOS8 - iOS10

edited May 23 '17 at 10:29

Community

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answered Aug 20 '15 at 07:06

Ashish Kakkad

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@MugunthanBalakrishnan Welcome anytime :) – Ashish Kakkad Aug 20 '15 at 07:26

UIAlertController Error When called in a modal presented view controller in swift

1 Answers1